Gas stove



jufiy Z2 1924. 1.5%2200 w. T. HOWI ETT ET AL GAS STOVE Filed Jan. 14

M N QQI mm ATTORNEY?% Patented July 22, 1924.

1,502,2etl

WILL AM T. HOWLETT AND HENRY o. s vnrnjon new YORK, NQY;

GAS STOVE.

Application filed January 14, 1922. Serial N 0'. 529,127.

To all whom it may concern:

Be it known that we, WVILLIAM T. How- LETT and HENRY 0. SMITH, bothcitizens of the United States, and residents of New York, in the countyof Kings and State of New York, have made a certain new and usefulInvention in Gas Stoves, of which the following is a specification.

This invention relates to gas stoves, and has for its primary object theprovision of a gas stove which is simple in structure, economical ofmanufacture, and economical and efficient in-operation. I

A further object of the invention is to provide a gas stove which reliesupon circulation of heated air entirely for its. efficient operation, asdistinguished from heat radiation, with the incident advantages ofsafety, economy in gas consumption, and.

more efficient and greater distribution of heat for any given period oftime.

A further object of the invention is to provide a gas stove of thecharacter hereinbefore set forth wherein effective thermo insulation isobtained for the sides of. the

stove whereby the same remain cool irrespective of the time of operationthereof, thereby eliminating great sources of. danger of stoves of thisnature both for confiagration or burns due to incidental or othercontact with-the sides of a stove when in use,

A further object of the invention ,is to employ the principle of theBunsen burner in connection with a stove of this nature, and to employin connection therewith a maximum amount of draft to effect heating aircurrents and thereby secure heat by circulation as distinguished fromthe ordinary.

gas stove structure which is designed either to heat an area of thestove itself and thereby efi'ect heating through radiation, or to heatby radiation and circulation.

A further object of the invention is to provide means in connection withthe utilization of the Bunsen burner principle for rendering the samesubstantially noiseless in,

operation.

Further objects of theinvention will appear more fully hereinafter.

bythe accompanying drawing. and finally pointed out in the appendedclaims.

Referring to the draw1ng,

embodying our invention;

Fig. 2 is a sectional view taken on the line 22 of Fig. 1, and lookingin the direction of the arrows; and

Fig. 3 is a similar view taken on the line 3-3 of Fig. 1, and looking inthe direction of the arrows. 1

The same part is designated by the same reference character wherever itoccurs throughout the several views.

As hereinbefore briefly outlined, the stove of our invention is directedto utilizing the Bunsen burner principle for heating large currents ofair by constantly flowing by, a heated area or surface to thereby effectheating by circulation as distinguished from radiation alone, orradiation and circulation. Heating accomplished :in this manner is wellrecognized in the art to be more eflicient and more economical than theradiated heat type of stove. The reason for this will be obvious when itis considered that if good circulation is obtained, the heat is moreefficiently distributed, and in consequence a greater area and volumecan be heated in the shortest possible time. An-

other disadvantage of the type of stove which radiates heat is that thesides of the stove become extremely hot,vfrequently resulting in badburns to children or grown-' ing our inventionin connection with theillustration thereof contained on the draw::

ing appended hereto, but we wish it to be understood that. thestructureselected for the purpose of illustration is tolbe regarded inan'illustrative sense and notin a limiting sense, and we do not desireto be limited or. restricted to any particular form, shape, size,construction or material, as many modifications and changes in detailsand arrangements will readily occur to those skilled in the art withoutdeparting from the spirit and scope of our invention. .-,In the formshown, however, we show a usual stove structure, preferably cylindrical,with the; outer shell 1 thereofof any suitable mate rial, preferablymeta-l, supported by the,

usual legs' 2. T'heshell 1, if desired, may be provided with anornamental skirt '3, secured to the bottom part thereof, and ispreferably provided with abottomA, secured thereto, which bottom 1 ispreferably of metal provided with numerous fine perforations therein.The purpose of the perforations is to afford greater air draft, as will"be more fully hereinafter set forth, and at the same time a-fEord abottom to the structure to prevent any material-fromfalling through thebottom of the stove. \V hile this bottom isgnot strictly required withthe gas stove of our invention, it is neverthe'lessshown, as the "sameconstitutes a requirement in some States-ass. fire preventive measure.lhe gas supply; is fed through the bottom of'the stove 1 in any suitablemanner, "for example,

by means-"of a'pipe "'6,-wliioh' is secured to an angle j oint 7 theBunsen burner structure s'zbe'ing lik wise secured thereto and projecting: upwardly in the' shell 1, in the approxii mate: centrethereof.of course, the pipe supply:6 is provided=with means for attac mentjto'arigid or fieXib-le'supplypipe (not shown), an'd is controlled by theusual or -any: desired type I of stop =cock (not shown) w The Bunsenburner is of the usual construction, including the air'supply 10, andthe tip thereof- 11 extends Well towards the "centre o'f the shell 1.Suitably supported by the 1 shell 1, lout spaced therefrom is a- 'metal'plate 12,*Wh10l1, in the form shown, is cylindrical.

Any suitable-i means -may "be provided for supportingthe shell 12 in itsspaced relation with-" re'ferei'ice to the shell- 1. W e haveshown-*as-illustrative of one-means, towhioh,

however, we do not desire 1 to be limited or restricted,' braokets-13,riveted or otherwise secured at one "-end to the-shell 1, and at theother 'end to the shell '12. We insulate the metal-shell 12 withreference to' the sh'ell 1,

as efliciently as economy andfacility will permit, and ha-ve found thatthe mostefli- V cieamnd economical 1 method of insulating the same is'by 'means of an I asbestos cover 1 a ing 14, whichcompletely surroundsthe same and 'is' he'ld in pl a'ce by 1 screws,- rivets, bolts or thelike. For this purpose the attaehment me'ans employed for securing theends of the braekets 13 #may loe employed. The

' shell -12' is of 'muehshorter length than the shell 1, -and ispositioned "relative the tip "11 of the Bunsen burner- 8, so that theend of the burnerprojects in'the approximate centre of' the she11 12 buta slight; distance. In

other words', the ehurner and the shells 12 and '1' are in concentricarrangement with each-other, with the she'11 12'looat'ed at theapproximatecen'tre Of the shell 1, with the I tip 11 of 'the-'fPiims'enburner projecting upwardly in the shell 12-Tshort d'is'tance. At' ornear thebottompf' the shel1 12, -w e provide suitable lmeans forsupporting What we will term the'crucib'le-shaped radiator.

'While these means may be of any suitable or desired nature, we havefound it suflicient to bolt, screw,.rivet or otherwise attach to theshell 12 (and likewise utilize these bolts,

-:etc.,'to hold the lower edge of the asbestos covering 14: on the shell12) a plurality of brackets 15* with theiriends upturned as at 16,

to form flanges to position and retain thereon the crucible shapedradiator17. The-crucible shaped radiator 17' may be of anyfsuitahle ordesired shape or material. We have found, however, a radiator formed offire clay "open at one end and closed at theot-heryandprd vided withnumerous I perforations 18, there-" 0 in, for easy flare'of gas Hame-and positioned in an inverted position over the brackets "15, to' beeffective for 'the purpose of thisinvention. 'The radiatoris spaced isconcentrically =-arranged 1 relative 3 to "the shells l and 12 andthe'bu'rner 8, j To'ipr-e vent injury t0 the radiator, espeoially duning the-shipment tlzsreof, an 'qadd-itional bracket'20 of any suitablematerial may be provided 'for engagement with the' to 6f the crucible-'shapedradiator-17. The' top of the stove is provided with" a' hoodwhich may be of any suitable shapeor; material. Vie have found itadvisable-toinsike the top'21- separate from the shell- 1, and capableof being inserted therein,-as one meansofsecuringthe two together. The

top may be formed in any suitable-manner.

The I sole *function thereof 1 is to permit free-' egress of air fromwithin the-shell 'l therethrough. Therefore, the same may be formedofwire mesh,"or, as shown, ofme'tal provided with numerous "largeperforations therethrough. The-top may be prov'ided permit utilizing anexceedingly large draft area.

The operation of the burner thus fa'r described :is as follo'w'sz r IThe Jgas is turned onso thait m mbstructed flow to the Bunsen b'urner'is 'iob-: tained, and a flame is applied to the ti'pof the burnerthrough the door 23, The heat of the flame, of course,iheats ithe'orucible shaped "radiator 17 *and the inner shell 1'12,

and the space between 12 andl'l'Y. "At'the froin the inner shell 12,asisapparena and with a door: 23, i equipped with any 'isu'itable sametime an enormous' idraft area is Ipro- V vided at the lower portionofthe'stove and due to thehea't from the'burne'r, the cruelble shapedradiator 17, and-the inner shell 12, the air passingtherebybecomesheated through contact therewith, which heated air usefuland our own invention and desire to is augmented, of course, by aportion of the air passing by the burner tip 1nto the crucible shapedradiator and through the perforations thereof, and the air flowingbetween 1 and 12 becomes mixed with and heated by the heated air. Thisheated air flows freely through the top or hood of the stove, andnaturally seeks the altitude. With this construction it will be apparentthat the colder air from the bottom of the room is first utilized forheating purposes, and the heated air is circulated, as distinguishedfrom radiation, because due to the outer shell 1 being effectivelyinsulated from the inner shell 12, non-radiation is obtained, with theincident advantages of safety hereinbefore pointed out, while, at thesame time, due to the large volume of air handled by the stove, thecirculation is speeded up, and in consequence the greatest amount ofheat is circulated to effect heating in the least amount of time, withthe resulting greater efficiency and economy, as above stated. Thecrucible shaped radiator 17, in addition to serving its function ofheating, also serves to render the Bunsen burner substantially noiselessin operation.

Many modifications and changes in details will readily occur to thoseskilled in the art without departing from the spirit and scope of ourinvention as defined in the claims, but having now set forth the objectsand nature of our invention, what we claim as new and secure by LettersPatent is:

1. In a gas heater, an outer shell having a perforated lower area and anunperforated upper area, a perforated bottom for said outer shell, aninner shell supported from said outer shell in spaced relationtherefrom, said inner shell extending from said perforated area andterminating in said unperforated area to thereby provide a free airinlet area below said inner shell and a large heat mixing chamber abovesaid inner shell, a radiator supported in spaced relation within theinner shell, and a burner extending into said radiator.

2. In a gas heater, an outer shell having a perforated lower area and anunperforated upper area, a perforated bottom for said outer shell, aninner shell supported from said outer shell in spaced relationtherefrom, said inner shell extending from said perforated area andterminating in said unperforated area to thereby provide a free an inletarea below said inner shell, an asbestos covering for said inner shell,a large heat mixing chamber above said inner shell, a crucible shapedradiator supported in spaced relation within said inner shell, and aburner extending into said radiator.

In testimony whereof we have hereunto set our hands on this 12th day ofJanuary, A. D, 1922.

WILLIAM T. HOWLETT. HENRY O. SlllITH.

